meander lawn: September 2012

Perplexible followup

David Millar is kind enough to feature one of my puzzles on his puzzle blog. No, not this one, the other one. It's an old puzzle, and I haven't made any Ice Barns (rules) in quite a while, so I decided to make another one for the sake of new visitors who like the one up on Perplexible. You can find a few more (and, frankly, better) puzzles of this type elsewhere.

This one is both easier and more typical of how solves of the type feel than the Perplexible one. Clicking on the picture opens the puzzle up in the wonderful pzv.jp environment.

Territory

Yet another Nikoli rarity. The original Japanese name of なわばり is pronounced nawabari.
Partition the grid into rectangles by drawing along grid lines. Each rectangle contains exactly one clue. The clues describe how many of the four sides of their cell are drawn.

Tunnel Vision

Tunnel Vision = Wild Labyrinth + Corral Clues = Build A Maze + regular expressions + Corral Clues.

The longer version of the rules goes something like this. Find an open, 1-cell wide path of edge adjacent cells which visits all cells exactly once. This path is entirely forced by drawing walls on grid lines. A clue inside the grid indicates the number of orthogonally visible cells, including the cell itself. Visibility is obstructed by walls. Clues on the outside indicate the length of walls along the grid line in order of appearance. Consecutively clued wall segments may not overlap, nor share corners. A single wall length may be replaced by ?. Any number of clues, including none, may be replaced by *. An unclued line is equivalent to *. A line with no wall segments may be clued as 0.

To the best of my knowledge, Riad Khanmagomedov invented this puzzle type, and Grant Fikes added the regular expressions. The idea of inserting Corral-style clues inside comes from a previous post.